lesson 1-2 the early days of flight lesson 1-2 the early days of flight
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Lesson 1-2Lesson 1-2The Early Days of FlightThe Early Days of Flight
Lesson 1-2Lesson 1-2The Early Days of FlightThe Early Days of Flight
Chapter 1, Lesson 2
OverviewOverviewOverviewOverview
Developments in lighter-than-air flight from da Vinci to the Wright brothers
Ways balloons were used during the US Civil War
Ways the balloon contributed to US victory in the Battle of San Juan Hill during the Spanish-American War
Developments in heavier-than-air flight from da Vinci to the Wright brothers
Chapter 1, Lesson 2
Developments in Developments in Lighter-Than-Air FlightLighter-Than-Air Flight
Developments in Developments in Lighter-Than-Air FlightLighter-Than-Air Flight
From da Vinci to the Wright brothers…
Taken from wikipedia.com Courtesy of the Library of Congress
Chapter 1, Lesson 2
Developments in Developments in Lighter-Than-Air FlightLighter-Than-Air Flight
Developments in Developments in Lighter-Than-Air FlightLighter-Than-Air Flight
From 1700 to 1900, we knew there were 3 challenges that needed to be solved for man to fly:Getting up in the air (lift)Staying up in the air (sustain lift)Controlling where you went in the air (steer)
Led to 2 schools of thought:Lighter-than-air machinesHeavier-than-air machines
Taken from wikipedia.com Courtesy of the Library of Congress
Chapter 1, Lesson 2
Principles of Balloon FlightPrinciples of Balloon FlightPrinciples of Balloon FlightPrinciples of Balloon Flight
A balloon operates on the principle of buoyancy
If the air or gas inside a balloon is lighter than the air around it, it will float
Hot air takes care of the first challenge of flight---lift---getting up into the air
Courtesy of Clipart.com.
Chapter 1, Lesson 2
Balloon FlightBalloon FlightBalloon FlightBalloon Flight
A Jesuit priest, Laurenço de Gusmão, gets credit for inventing the hot-air balloon
In 1709 he demonstrated his invention before the King of Portugal
The work of Joseph and Étienne Montgolfier led to the first balloon flight with humans aboard
The Montgolfier Brothers The Montgolfier Brothers The Montgolfier Brothers The Montgolfier Brothers
The Montgolfiers’ experiments started with an observation in front of the fireplace
Joseph made a small bag out of silk and held the bag upside down
Then he lit a fire under the opening at the bottom—the bag swelled and rose to the ceiling
They figured the smoky air was a special type of gasThey called it Montgolfier GasToday we know that they’d simply observed a principle of
physics: Hotter air rises above cooler air
Chapter 1, Lesson 2
The Montgolfier BrothersThe Montgolfier BrothersThe Montgolfier BrothersThe Montgolfier Brothers
The Montgolfiers’ experiments attracted attention of French King Louis XVI and his Queen, Marie Antoinette
This led Montgolfier to fly the first ever passengers up into the “poisonous” atmosphere:
A sheep, rooster, and a duck
Eventually this led to the first manned balloon flight, on 21 November 1783
Balloons and LiftBalloons and LiftBalloons and LiftBalloons and Lift
Meanwhile, the young scientist J. A. C. Charles experimented with hydrogen
Hydrogen is 14 times lighter than air
Hydrogen is dangerous -- it tends to explode Charles flew his hydrogen balloon 2 weeks after
Montgolfier flew before King Louis XVI Their flight lasted more than two hours and covered more
than 27 miles
Benjamin Franklin saw a Charles balloon in 1783 He immediately wrote home, stressing the military
importance of the new invention
Chapter 1, Lesson 2
Hydrogen BalloonsHydrogen BalloonsHydrogen BalloonsHydrogen Balloons
2 years later (January 7, 1785) was the 1st successful crossing of the English Channel by hydrogen balloon
Jean Pierre Blanchard and Dr John Jeffries
June 1785 saw the first hydrogen balloon fatalities Pierre Romain and Pilatre de Rozier took off with 400,000
people in Paris watching below They crossed over the English Channel, only to see the wind
shift and push them back to Paris Their balloon collapsed and crashed to the ground
Since then many more people were killed in fiery hydrogen explosions until helium came into use
Chapter 1, Lesson 2
Hydrogen BalloonsHydrogen BalloonsHydrogen BalloonsHydrogen Balloons
January 9, 1793 saw Blanchard make the first successful hydrogen ballon flight in the U.S.
Took off from Philidelphia at 10:00 am Rose over 5,000 feet altitude where he conducted some
simple experiments Landed in Deptford Township, New Jersey at 10:56 am
Also in 1793, the French Army started using balloons for aerial reconnaissance
Aerial reconnaissanceAerial reconnaissance is looking over battlefields from the sky
Chapter 1, Lesson 2
Hydrogen BalloonsHydrogen BalloonsHydrogen BalloonsHydrogen Balloons
So hydrogen balloons solved the first two problems of flight…..which were…..
But balloons couldn’t solve the 3rd problem of flight…..which was….
So, some smart people started figuring out how to steer a ballon…..
Chapter 1, Lesson 2
DirigiblesDirigiblesDirigiblesDirigibles
“Dirigible” Dirigible” means “the ability to steer” First, inventors had to come up with several
big changes in balloon designBig Change #1 -- Changing the ShapeBig Change #2 – Gas EnvelopesBig Change #3 – Engines, Propellers and
ruddersBig Change #4 – Rigid, internal frames
Chapter 1, Lesson 2
First DirigibleFirst DirigibleFirst DirigibleFirst Dirigible
In 1852 Henri Giffard of France built a cigar-shaped dirigible
A three-horsepower steam engine pushed it through the sky at about five miles an hour
Most historians give Giffard credit for inventing the first successful dirigible
Chapter 1, Lesson 2
Dirigible ImprovementsDirigible ImprovementsDirigible ImprovementsDirigible Improvements
Some inventors tried out internal keels A keelkeel is a structure that extends along the
center of a craft from the front to the back A keel helps keep the craft rigid and fully
extended A rigid craft has a frame that contains several
balloons to provide lift A non-rigid ship holds its shape through gas
pressure alone
Chapter 1, Lesson 2
Dirigible ImprovementsDirigible ImprovementsDirigible ImprovementsDirigible Improvements
In 1872, German engineer Paul Haenlein built a dirigible with an internal-combustion engine
An internal-combustion engineinternal-combustion engine is an engine in which the fuel is burned inside, rather than in an external furnace
For example, a gas-burning car engine is an internal combustion engine
Chapter 1, Lesson 2
Alberto Santos-DumontAlberto Santos-DumontAlberto Santos-DumontAlberto Santos-Dumont
Santos-Dumont’s first dirigible82 feet long3-horsepower gasoline motorReached an altitude of 1,300 feetSteered with a rudder
Between 1898 and 1907 Santos-Dumont built and flew 14 of these non-rigid airships
Chapter 1, Lesson 2
Alberto Santos-DumontAlberto Santos-DumontAlberto Santos-DumontAlberto Santos-Dumont
In 1901, Santos-Dumont flew an airship around the Eiffel Tower
He completed a nine-mile loop in less than half an hour
This won him a big cash prize from a rich oilman named Henri Deutsch
Santos-Dumont gave the money to his own workers and to the poor of Paris
He sparked great worldwide interest and enthusiasm in aviation
Courtesy of Clipart.com
Chapter 1, Lesson 2
Count von ZeppelinCount von ZeppelinCount von ZeppelinCount von Zeppelin
In July 1900 Count von Zeppelin, a German inventor, built and flew the first successful rigid dirigible, the LZ-1
This led to the world’s first commercial airships The Zeppelins were luxurious:
Roomy, wood-paneled cabins Carried 20 or more passengers
They flew at speeds exceeding 40 miles an hour Zeppelins became the aerial oceanliners for the rich and
famous with a perfect safety record Until disaster struck in 1937 (Hindenburg)
Chapter 1, Lesson 2
AeronautsAeronautsAeronautsAeronauts
After the Civil War began, many aeronauts volunteered their services for the Union cause
AeronautsAeronauts are people who travel in airships or balloons
One of these aeronauts was Thaddeus Lowe He tried to interest Gen Winfield Scott—head of the
Union Army—in balloons But Scott saw no military need for them, and Lowe
didn’t give up
Chapter 1, Lesson 2
Thaddeus LoweThaddeus LoweThaddeus LoweThaddeus Lowe
Lowe was a friend of Joseph Henry, the head of the Smithsonian Institution
Henry convinced President Lincoln to let Lowe demonstrate what a balloon could do
This demonstration made Lincoln realize how useful balloons could be for keeping an eye on Confederate forces
Lincoln sent Gen Scott a note asking him to reconsider Lowe’s offer
Chapter 1, Lesson 2
The Balloon CorpsThe Balloon CorpsThe Balloon CorpsThe Balloon Corps
Lowe was finally allowed to organize the Balloon Corps of the Union Army
But it was a struggle: Lowe often had to pay for staff and supplies out of
his own pocket It was sometimes hard to get permission to send
the balloon aloft
Despite some success, the Army disbanded the balloon corps in 1863
Chapter 1, Lesson 2
Balloons and the Balloons and the Battle of San Juan HillBattle of San Juan Hill
Balloons and the Balloons and the Battle of San Juan HillBattle of San Juan Hill
In 1892, Brig Gen Adolphus V. Greely established a balloon section in the Signal Corps
A few years later, the United States was at war with Spain
The Battle of San Juan Hill gave the Army a chance to see what a balloon could do
Chapter 1, Lesson 2
Battle of San Juan HillBattle of San Juan HillBattle of San Juan HillBattle of San Juan Hill
Lt Col George M. Derby insisted on bringing the Army’s single spy balloon as close to the action as possible
From that position, observers on board could see a new trail leading to the Spanish forces
US commanders divided their Soldiers into two forces to advance against the enemy
Chapter 1, Lesson 2
Battle of San Juan HillBattle of San Juan HillBattle of San Juan HillBattle of San Juan Hill
The observers also suggested directing artillery fire from El Pozo Hill against the San Juan Hill trenches
Historians say these actions may have turned the battle into a US victory
Courtesy of the Library of Congress
Chapter 1, Lesson 2
Developments inDevelopments inHeavier-Than-Air FlightHeavier-Than-Air Flight Developments inDevelopments in
Heavier-Than-Air FlightHeavier-Than-Air Flight
Sir George Cayley picked up where Leonardo da Vinci left off in developing gliders
This Englishman’s gliders resembled today’s model gliders
They had the same design as most of today’s airplanes, with wings up front and a tail behind
Chapter 1, Lesson 2
Cayley’s GlidersCayley’s GlidersCayley’s GlidersCayley’s Gliders
Cayley also had the idea of using a fixed wing for lift and a separate system for propulsion
The fixed-wing idea seems simple now But it was quite new at a time when many
people still had flapping birds’ wings as their model for flight
Chapter 1, Lesson 2
Cayley’s GlidersCayley’s GlidersCayley’s GlidersCayley’s Gliders
Cayley identified three important aviation forces: LiftLift – force pushing up against gravity Drag - Drag - the pull, or slowing effect, of air on an aircraft Thrust - Thrust - the forward force driving an aircraft
In 1850 Cayley built the first successful full-size manned glider
Chapter 1, Lesson 2
Otto LilienthalOtto LilienthalOtto LilienthalOtto Lilienthal
Otto Lilienthal of Germany is often called the “Father of Modern Aviation”
Between 1891 and 1896 he made more than 2,000 glides
He also developed a powered biplane A biplanebiplane is an aircraft with two main supporting
surfaces, usually placed one above the other
Chapter 1, Lesson 2
Otto LilienthalOtto LilienthalOtto LilienthalOtto Lilienthal
On the eve of the test flight of his biplane, he decided to fly his glider one more time
His glider stalled at 50 feet up and dropped like a rock, and Lilienthal was killed
Taken from wikipedia.com
Chapter 1, Lesson 2
John MontgomeryJohn MontgomeryJohn MontgomeryJohn Montgomery
American John Montgomery unveiled his glider to the public in 1905
He thrilled people by performing sharp dives and turns in the air
His glider reached speeds of 68 miles an hour
But on 31 October 1911, he was killed in a glider accident
Chapter 1, Lesson 2
Failed Attempts to Failed Attempts to Construct an AirplaneConstruct an Airplane
Failed Attempts to Failed Attempts to Construct an AirplaneConstruct an Airplane
In 1843, W. S. Henson & John Stringfellow designed an aircraft theoretically capable of carrying a man
The two received a patent for their design A patentpatent is a legal document protecting the
rights of an inventor
Chapter 1, Lesson 2
The ArielThe ArielThe ArielThe Ariel
Their aircraft, the Ariel, was to be a monoplane
A monoplanemonoplane is a single-wing airplane It would have a 150-foot wingspan It would be powered by a steam engine
driving two six-bladed propellers
Chapter 1, Lesson 2
Stringfellow’s Work ContinuedStringfellow’s Work ContinuedStringfellow’s Work ContinuedStringfellow’s Work Continued
As it turned out, the Ariel was never built
But in 1848 Stringfellow built a steam-driven model that did fly
This was the first successful powered flight of a heavier-than-air craft
Courtesy of HIP/Art Resource, New York
Chapter 1, Lesson 2
Samuel LangleySamuel LangleySamuel LangleySamuel Langley
Dr. Samuel Pierpont Langley was one of the first Americans to try to build a flying machine with a motor
He started experimenting with aerodynamics in 1885
In 1898 the US government gave him a $50,000 grant to continue his work
Courtesy of Hulton Archive/Getty Images, Inc
Chapter 1, Lesson 2
Samuel LangleySamuel LangleySamuel LangleySamuel Langley
On 7 October 1903 his aircraft, the Aerodrome was ready for a test flight
The plane’s engine worked well, but the aircraft caught on the launching car on takeoff and fell into the river
Two months later, Langley tried—and failed—again
Government officials withdrew their support, so Langley gave up his project
Samuel LangleySamuel LangleySamuel LangleySamuel Langley
Samuel LangleySamuel LangleySamuel LangleySamuel Langley
Chapter 1, Lesson 2
Samuel LangleySamuel LangleySamuel LangleySamuel Langley
Historians fault Langley for spending too much time on how to power his aircraft, and not enough on how to control it
Even so, for his contributions to aviation, Langley Air Force Base in southeastern Virginia is named after him
Courtesy of Senior Master Sgt. Keith Reed/the U.S. Air Force
Chapter 1, Lesson 2
Next….Next….Next….Next….
Done—the early days of flight
Next—the Wright brothers
Courtesy of NASA